Microsoft Rolls Out Copilot Harness in Foundry Agent Service
Microsoft is launching Copilot harness in Foundry Agent Service as a public preview, providing developers with a ready-to-use environment for building and executing complex AI agents.

What happened?
Microsoft is launching Microsoft Copilot harness in Foundry Agent Service in public preview. The service offers a fully managed framework for developers to build autonomous agents with support for reasoning, tool usage, and execution environments for complex workflows. Simultaneously, the company announced general availability for persistent execution of long-running agent processes.
Key facts
| Produkt | Microsoft Copilot harness |
|---|---|
| Plattform | Foundry Agent Service |
| Status | Public Preview |
”It gives developers a fully managed way to build agents that reason, use tools, and complete complex, long-running tasks.”
Why it matters
While language models can reason, executing actual tasks requires context, the right tools, and a robust execution environment. By using a unified framework, developers no longer need to build all surrounding systems themselves, which reduces the complexity associated with operating advanced AI agents.
Who is affected?
The tool is primarily aimed at software developers, AI architects, and enterprise customers building custom agent solutions within the Microsoft ecosystem and Azure infrastructure.
Impact on the EU
The service is being launched in preview globally via Azure Foundry. European companies and organisations building on Microsoft's cloud can therefore utilise the framework, subject to standard data protection and regulatory compliance requirements under GDPR and the EU AI Act.
What else you should know
The launch also includes general availability for long-term resilience in hosted agents, minimising disruptions during extensive automated runs.
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